Filter-press



l 10.749.140 PATENTBD JAN. 5,1904.

' E. B. HACK.

FILTER PRESS.

APPLICATION lFILED JAN. 19, -1903.

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PATBNTBD JAN. 5, 1904.

E. B. HACK.

FILTER PRESS.

.APPIJIOATION FILED JAN. 19, 1903.

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PATENTBD JAN. 5, 1904. 513.54014..

PILTERPRESS. v APPLICATION FILED JAN. 19, 1903.

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No. 749,140. PATENTED'JAN. 5, 1904.

E.V B.HA0K. FILTER PRESS. l APPLICATION FILED JAN. 19, 1903. l

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A from/Ex WIr/s155555.- 02m@ @MM/7 a UNITE-n STATES 'ERNEST BARTON HACK,or DENVER,

Patented January 5, 1904.

l PATENT OFFICE.

COLORADO, ASSIGNOR TO THE AMERI- CORPORATION OF COLORADO.

FILTER-PRESS.

sPEclFIcATION .farming part'of Letters Patent No.'749,1 4o, ated January5,- 1904.

Applaus@ mea January 19, 1903. seria No. 139,714. N0 model.) l

such as will enable others skilledin the art to Io which it appertainsto make and use the same, reference being had to the accompanyingdrawings, and tothe letters of reference marked thereon, whichspecitication.

My invention relates to improvements in ilter-presses, m yobject beingto facilitate the extraction of gold and other valuable metals fromtheir ores or matrix by means of any suitable solution-as cyanid ofpotassium, sozpo 'dium, barium, dac-whereby the metals may be dissolvedand drawn oi from the gangu'e.

The invention will nowbeV described in detail,reference being made tothe accompanying drawings, in which is illustrated an embodimentthereof. In the drawings,Figure 1 is a top or plan view of'afilter-press equipped with myl improvements. Fig. 2 is a side elevationof the same. Fig'is a section takenon the line 3 3, 3o Fig. 6.

4 4, Fig. 7. Fig. 5 is a section taken on the line 5 5, Fig. 7. Fig. 6isadetail View showing one of the filter-frames or filtering members, onau enlarged scale, the mesh material being broken .away to disclose theintermediate construction which support-s the mesh material or preventsit from collapsing in re-A sponse to the pressure within the press. Thesupporting side bars for the filter-press are 4o shown in cross-sectionin this view, and the ligure may therefore be termed a cross-sectionf ofthe press taken between a filterframe and a pulp or cake frame, theAintermediate perforated or slotted bars A7 being also shown in section.Fig. 7wis a detail view of a pulp-cake frame shown on the same scale asthe filter-frame in Fig. 6. This view is similar to Fig. 6, thehorizontal supporting side bars being shown in section.

form a part of this Fig. i is a section taken ou theline.

The same reference` characters indicate the same parts in all the views.

Let A and B, respectively, designate the filter and' pu1pcake frames,which constitute the main features of the filter-press. These frames Aand B are alternately arranged, as best shown in Fig. 5, between twoendiheads or plates Uaud J ,-which are forced together,

between the frames A land B. The head U is a part of an integral castingforming the support for one end of the press, w'hile. the

as hereinafter explained, to make tight-joints headJ is inovably mountedon two parallel' longitudinal screw-shafts which arefmade T T, remotefrom the casting U. Between The saddle-pieces when resting on the fastat one extremity in a s'upportin1.J;-casting-`6 ,5 the head J and thecasting T T the shafts and the bearings J of thev head J. This head hasa free sliding movement on the shafts 0,.

which pass .through the bearings 'J'. The frames A and B are-providedwith hooks A' and B', respectively, located on opposite sides of theframes and engaging the shafts O, whereby the frames are supported inoperative relation. The head U'is provided with hook-shaped bearings U',open at the top tov receive 'the shafts O, whereby the latter aresupported at their. extremities remote from the casting T. The shafts Oproject a short distance beyond thehe'ad U, as shown at O2, and on theseprojections are fulcrumed two levers L, consisting of bifurcated plateswhose short arms L' engage thehead U on opposite sides. The long arms ofthe 'leversproject beyond their fulcrums at right angles .to theextension of the short arms L, and the extremities of these long armsare provided vwith nuts L2, in which are threaded the oppositeextremities of a union-screw M M or a screwv provided withright-and-left threads.

wheel N, the turning of which in the proper direction causes theouter-.extremities of the To thecenterof this screw is attached a hand-varms Lto approach each other, whereby the short arms of the levers areforced against lugs N, formed integral with the head or end frame T andprovided with a hand-wheel This screw P is also employed in thepreliminary adjustment of 'the frames preparatory to -the finaltightening act through the instrumentalityofthelevers. The naltighteningact of the levers is accompani-edby only a very slight movement,consisting in the squeezing together to a slight degree'of'the4 variousfilter and pulp-cake frames in order to ina-ke the joints uniformlytight. It is absolutely necessary that these joints should be tight,owing to the fact that when the press is in use there is an interiorpressure of considerable magnitude,which pressure would be sufficent 4toforce'the solutions out through the joints were theynot made perfectlytight.

Each filter-frame consists of a flat :bar A', surrounding a rectangularspace of suitable area regulated or determined according tothe desiredsize of the press. To the opposite sides of this frame part A* areapplied ltwo pieces of mesh material A, while between the two layers ordiaphragms Asis located a number of bars A7, provided with slots A.'lhese bars form a backing to support the'mesh material As when pressureis applied to' force the solutions through the filtering material of theframes. 1

The rail A2 of each filter-frame is provided with exterior projectiousA"and A", located at opposite diagonal corners. The projection A5 isprovided' with openings X and Y', hav-l ing no direct communicationwiththeinterior of the frame or the space betweenthe mesh diaphragms A3.The projection vA6 is provided with openings V and W, the openingVcommunicating with 'the interior of the' frameby means of an eiluxereducti'on channel V2, formed in the' rail Az and indicated by'dottedlines in Fig. 6, through which channel the solutions escape from thepress after having been forced through the'pulp in the cake-iframes, themesh material A', and the At the lower corner of each filter-frame islocated a faucet K, forming an alternativeelux or A7 and openings V.

eduction channel which may be employedto draw oi the solutions in'lieuof the channels Each pulp-cake frame, which has been re'- ferred togenerally and as a whole by the letter B, consists of a flat rail or barB, which 1s engaged by` the corresponding parts of the `lterfnatllr1e toform closed joints when the members of the press are assembled. Each ofthese frames is provided at its upper and lowerdiagoual corners withexterior projections B' and B. The project-ion B' is provided with twoopenings X Iand Y', which respectively communicate with the interiorspace surrounded by the rail B by channels X and Y. (Indicated by dottedlines in Fig. 7.) The exterior projectionvB is provided with openings V'and W', the opening W communicating with the interior ofthe frame.

or the space surrounded thereby by a channel W, formed in the rail. Theopening X is for the introduction of the ore-pulp to the pulp-frames.The opening Y- is for'theintroduction of the solvent solutions andliquids to the pulp-frame', while the opening W is for the .introductionof air to the ypulp and solutions of the cakeframes.

When the flterand cake frames are assem-v When' the apparatus is in use,the pulp ,to .be treated is introduced to the pulp-frames by 'forcing itinto the longopeningformedby. the registeri ng openings X and X of thefilter and cake frames, whereby all of the pulpframes are'fllled withpulp, which is forced into the apparatus under air-pressure and eny tersthe cake-frames Bvby way of channels X. j After the frames B are filledwith pulp air under pressure is introduced to the long opening formed bythe various openings W and W' of-all'of the filter and pulp frames,

whereby theairenters the pulpin'the frames B and removes the superfluousmoisture or fluid by forcing it out through the filterframes by way ofthe channels X and openings V, the air being first passed through thepulp-cake-frau1es through the mesh material of the filtering members andthe slotted bars placed between the meshdiaphragms,as heretoforeexplained. The solvent Y solution is thenintroduoed tothe pulp of thecake-frames by way of openings Y ter the solutions have performed theirfunction they pass under pressure into and through the filter-frames andout of the press by way of the channels V2 and openings V' or by way ofthe faucets K, as may be d'esired, it being understood that the faucetsKform an 'alternative escape or discharge passage leading from thefilter-frame.

in the drawingssee Fig. 5,) only every other pulp-frame is providedlwith a channel Y', leading from its openingY', so that the solutions inorder to reach the pulp of the other frames B must first pass throughthe ltering material carried by the frames A. y

and channels Y. Af-

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- 1:5 Attention is called to the fact that,as shown out of thepulp-frames.

through the filter-frame the pulp cakes .are

dried by compressed air introduced by way of openings W' and W2, theairacting to force the remaining solutions out of the cakes. Water isinallyintroduced under pressure to remove the remaining solutions,vafter which the pulp cakes are again dried by the introduction of airand the residue discharged. This nal operation is accomplishedbyloosening the members of the press sufficiently to allow the pulpcakes to drop ,In further explanation of the construction and operationof my filter-press attention is calledto the fact that the channelsX2,Y?, and W2 of the pulp-cake -frames are com-v paratively narrougasindicated by dotted lines in Fig. v4, and are formed in the middle ofthe rail or equidistant between .the planes.v of its outer surfaces,whereby the vpulp and iuids are introduced in the central plane of theframes. By .means of 'this construction the pulp cakes are thoroughlypermeated by the solvent solutions and also by the air, which performsan important function in the. meta1-dissolving process. By reason of thecentral narrow channels X2 the pulp is also introduced tobettferadvantage and 'made to accumulate inpara'lrlel: layers, engaging the4iilter-clotli'spf the filters on opposite sides ot'` y the pulp-frame.Ihese layers of pulp are caused to cling to-the mesh of the filters by'reason of the pressure en the pulp, whereby the moisture is forced outthrough the filter during the formation'of the pulp cake. The A binpresencelof -two witnesses. if

opposite layers of pulp as they are.i.ncrease,d

in thickness approach the central plane,wli'i'hf" is last filled withpulp. The cake thus formed is least hard in its central plane, thusfacilitating the entrance and the even distribu tion of the air andsolutions. Hence the fluids work through the cakeof pulp in bothldireetionsthrough a central' plane'and pass thence through the filters.M

Attention is called Ito the fact that the hooks. B' B of the pulp-framesand A' A' of midway'of the vertical depth of the press, and aretherefore easily moved Qn the shafts O. This arrangement of the hooksalso fa-` cilitates the. tilting of the pulp-frames after they areseparated for the purpose of removing the cakes or residue after theleaching operation is completed.

Having thus described my invention, what vlateral passage for theintroduction of fluid,

a portion of the pulp-frames having two l'ateral channels for `theintroductionl of fluid, one 'for liquid and t-he other for air; thefiltering members having eflux or discharge channels for the escape ofthesolutions after they have lpassed through the pulp of the pulpholdingframes. p Y

' 2. The combination of a flter-press composed of distinct pulp-holdingand filtering members suitably arranged and having a the filter-framesare centrally located, wherel by the frames are supported by the shaftsO movable head or end, and IQtightelling-levers arranged to act on yoneof the head members, substantially as described.

In testimony-whereoflaflrmy signature ERNEST BARTON HACK..

